Business Zoom glitches, briefly grinding US schools to a halt Updated : August 25, 2020 09:48 AM IST Zoom did not disclose the cause of the problem, which appeared to hit both coasts of the US especially hard. Its shares fell less than 3percent during regular trading. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.